Starting TRT: Do You Qualify?
Who should consider testosterone replacement therapy, how to get diagnosed, and what to expect from your first consultation.
What is testosterone replacement therapy?
Testosterone replacement therapy (TRT) is a medical treatment that restores testosterone levels in men with clinically diagnosed hypogonadism (low testosterone). It's not a lifestyle enhancer — it's a medically supervised hormone therapy designed to bring testosterone back to normal physiological ranges. TRT can be administered via injections, gels, creams, pellets, or oral formulations, each with different absorption profiles and practical considerations.
Do you actually have low testosterone?
Not all men with symptoms actually have low testosterone. Fatigue, low libido, and brain fog can stem from many causes: poor sleep, depression, thyroid issues, vitamin deficiencies, or simply aging. A proper diagnosis requires two separate morning blood tests (before 10am) showing total testosterone below the reference range. Most guidelines consider <300 ng/dL (10.4 nmol/L) as clinically low, though some clinics treat men below 450 ng/dL with clear symptoms. Never start TRT based on a single blood test or symptoms alone.
The diagnostic process
A thorough diagnostic workup includes: (1) Two morning blood tests measuring total T, free T, SHBG, LH, FSH, estradiol, prolactin, CBC, and metabolic panel. (2) Physical examination including testicular exam and prostate assessment if over 40. (3) Detailed medical history including medications, previous steroid use, head injuries (pituitary), and fertility goals. (4) Sleep apnea screening — untreated sleep apnea can mimic and cause low T. (5) Depending on results, pituitary MRI if secondary hypogonadism is suspected. A proper diagnosis takes 2-4 weeks and multiple appointments.
Choosing a provider type
You have several options: (1) Traditional endocrinologist or urologist — most conservative, often reluctant to treat borderline cases, but gold-standard care when you qualify. (2) Men's health/anti-aging clinics — more willing to treat, often cash-pay, variable quality. (3) Telehealth TRT clinics — convenient, typically membership-based, largest variation in quality and pricing. (4) Primary care physician — hit or miss; most PCPs have limited TRT training. Research any provider thoroughly: check credentials, read reviews, and understand their protocol philosophy before committing.
What to expect at your first consultation
A thorough first consultation should cover: review of all lab results with explanation of what each marker means, discussion of your specific symptoms and when they started, fertility assessment and discussion of family planning goals, explanation of different treatment options (injections vs gels vs other), realistic timeline for symptom improvement (energy: weeks 1-4, libido: weeks 3-6, body composition: months 3-6), baseline measurements (weight, body fat if available, blood pressure), and a clear follow-up schedule with lab testing milestones. If a clinic prescribes on the first call without labs, walk away.
Frequently asked questions
What testosterone level qualifies for TRT? +
Most guidelines define hypogonadism as total T below 300 ng/dL (10.4 nmol/L) on two separate morning tests. However, many clinics treat symptomatic men with levels below 400-450 ng/dL. The key is two consistent low readings plus symptoms, not a single number.
Can I start TRT if I want kids later? +
Yes, but you must discuss this with your doctor. TRT suppresses natural testosterone production, which reduces sperm count. Adding hCG (human chorionic gonadotropin) can maintain fertility. Some men freeze sperm before starting. Never start TRT without a fertility plan if you want children.
How long until TRT starts working? +
Effects come in phases: improved energy and mood (2-4 weeks), increased libido (3-6 weeks), improved erections (3-6 months), body composition changes including muscle gain and fat loss (3-6 months), and increased bone density (6+ months). Some effects are immediate; others require consistent levels over months.
Do I need TRT forever once I start? +
For most men with true hypogonadism, yes — TRT is a long-term therapy, not a short course. Stopping returns you to your pre-treatment low-T state. However, some men use TRT temporarily, then attempt a 'restart' with medications like clomiphene or hCG. This works better for secondary hypogonadism (pituitary-driven) than primary (testicular). Discuss exit strategies before starting.
What's the difference between primary and secondary hypogonadism? +
Primary hypogonadism is a testicular problem — your testes can't produce enough testosterone despite normal brain signaling (high LH/FSH, low T). Secondary hypogonadism is a brain signaling problem — your pituitary doesn't send enough LH/FSH to stimulate the testes (low/normal LH/FSH, low T). This distinction matters for treatment choice and potential for 'restart' protocols.